/** * ZeroBin * * a zero-knowledge paste bin * * @link http://sebsauvage.net/wiki/doku.php?id=php:zerobin * @copyright 2012 Sébastien SAUVAGE (sebsauvage.net) * @license http://www.opensource.org/licenses/zlib-license.php The zlib/libpng License * @version 0.20 */ 'use strict'; // Immediately start random number generator collector. sjcl.random.startCollectors(); $(function() { /** * static helper methods */ var helper = { /** * Converts a duration (in seconds) into human friendly approximation. * * @param int seconds * @return array */ secondsToHuman: function(seconds) { if (seconds < 60) { var v = Math.floor(seconds); return [v, 'second']; } if (seconds < 60 * 60) { var v = Math.floor(seconds / 60); return [v, 'minute']; } if (seconds < 60 * 60 * 24) { var v = Math.floor(seconds / (60 * 60)); return [v, 'hour']; } // If less than 2 months, display in days: if (seconds < 60 * 60 * 24 * 60) { var v = Math.floor(seconds / (60 * 60 * 24)); return [v, 'day']; } var v = Math.floor(seconds / (60 * 60 * 24 * 30)); return [v, 'month']; }, /** * Converts an associative array to an encoded string * for appending to the anchor. * * @param object associative_array Object to be serialized * @return string */ hashToParameterString: function(associativeArray) { var parameterString = ''; for (key in associativeArray) { if(parameterString === '') { parameterString = encodeURIComponent(key); parameterString += '=' + encodeURIComponent(associativeArray[key]); } else { parameterString += '&' + encodeURIComponent(key); parameterString += '=' + encodeURIComponent(associativeArray[key]); } } // padding for URL shorteners parameterString += '&p=p'; return parameterString; }, /** * Converts a string to an associative array. * * @param string parameter_string String containing parameters * @return object */ parameterStringToHash: function(parameterString) { var parameterHash = {}; var parameterArray = parameterString.split('&'); for (var i = 0; i < parameterArray.length; i++) { var pair = parameterArray[i].split('='); var key = decodeURIComponent(pair[0]); var value = decodeURIComponent(pair[1]); parameterHash[key] = value; } return parameterHash; }, /** * Get an associative array of the parameters found in the anchor * * @return object */ getParameterHash: function() { var hashIndex = window.location.href.indexOf('#'); if (hashIndex >= 0) { return this.parameterStringToHash(window.location.href.substring(hashIndex + 1)); } else { return {}; } }, /** * Convert all applicable characters to HTML entities * * @param string str * @return string encoded string */ htmlEntities: function(str) { return String(str).replace(/&/g, '&').replace(//g, '>').replace(/"/g, '"'); }, /** * Text range selection. * From: http://stackoverflow.com/questions/985272/jquery-selecting-text-in-an-element-akin-to-highlighting-with-your-mouse * * @param string element : Indentifier of the element to select (id=""). */ selectText: function(element) { var doc = document, text = doc.getElementById(element), range, selection; // MS if (doc.body.createTextRange) { range = doc.body.createTextRange(); range.moveToElementText(text); range.select(); } // all others else if (window.getSelection) { selection = window.getSelection(); range = doc.createRange(); range.selectNodeContents(text); selection.removeAllRanges(); selection.addRange(range); } }, /** * Set text of a DOM element (required for IE) * This is equivalent to element.text(text) * * @param object element : a DOM element. * @param string text : the text to enter. */ setElementText: function(element, text) { // For IE<10: Doesn't support white-space:pre-wrap; so we have to do this... if ($('#oldienotice').is(':visible')) { var html = this.htmlEntities(text).replace(/\n/ig,'\r\n
'); element.html('
'+html+'
'); } // for other (sane) browsers: else { element.text(text); } }, /** * Convert URLs to clickable links. * URLs to handle: * * magnet:?xt.1=urn:sha1:YNCKHTQCWBTRNJIV4WNAE52SJUQCZO5C&xt.2=urn:sha1:TXGCZQTH26NL6OUQAJJPFALHG2LTGBC7 * http://localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM= * http://user:password@localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM= * * * @param object element : a jQuery DOM element. */ urls2links: function(element) { var markup = '$1'; element.html( element.html().replace( /((http|https|ftp):\/\/[\w?=&.\/-;#@~%+-]+(?![\w\s?&.\/;#~%"=-]*>))/ig, markup ) ); element.html( element.html().replace( /((magnet):[\w?=&.\/-;#@~%+-]+)/ig, markup ) ); }, /** * minimal sprintf emulation for %s and %d formats * From: http://stackoverflow.com/questions/610406/javascript-equivalent-to-printf-string-format#4795914 * * @param string format * @param mixed args one or multiple parameters injected into format string * @return string */ sprintf: function() { var args = arguments; if (typeof arguments[0] == 'object') args = arguments[0]; var string = args[0], i = 1; return string.replace(/%((%)|s|d)/g, function (m) { // m is the matched format, e.g. %s, %d var val = null; if (m[2]) { val = m[2]; } else { val = args[i]; // A switch statement so that the formatter can be extended. switch (m) { case '%d': val = parseFloat(val); if (isNaN(val)) { val = 0; } break; // Default is %s } ++i; } return val; }); } }; /** * internationalization methods */ var i18n = { /** * supported languages, minus the built in 'en' */ supportedLanguages: ['de', 'fr', 'pl'], /** * per language functions to use to determine the plural form * From: http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html * * @param int number * @return int array key */ pluralRules: { de: function(n) { return (n != 1 ? 1 : 0); }, fr: function(n) { return (n > 1 ? 1 : 0); }, pl: function(n) { return (n == 1 ? 0 : n%10 >= 2 && n %10 <=4 && (n%100 < 10 || n%100 >= 20) ? 1 : 2); } }, /** * translate a string, alias for translate() * * @param string $messageId * @param mixed args one or multiple parameters injected into placeholders * @return string */ _: function() { return this.translate(arguments); }, /** * translate a string * * @param string $messageId * @param mixed args one or multiple parameters injected into placeholders * @return string */ translate: function() { var args = arguments, messageId, usesPlurals; if (typeof arguments[0] == 'object') args = arguments[0]; if (usesPlurals = $.isArray(args[0])) { // use the first plural form as messageId, otherwise the singular messageId = (args[0].length > 1 ? args[0][1] : args[0][0]); } else { messageId = args[0]; } if (messageId.length == 0) return messageId; if (!this.translations.hasOwnProperty(messageId)) { console.log('Missing translation for: ' + messageId); this.translations[messageId] = args[0]; } if (usesPlurals && $.isArray(this.translations[messageId])) { var n = parseInt(args[1] || 1), key = this.pluralRules[this.language](n), maxKey = this.translations[messageId].length - 1; if (key > maxKey) key = maxKey; args[0] = this.translations[messageId][key]; args[1] = n; } else { args[0] = this.translations[messageId]; } return helper.sprintf(args); }, /** * load translations into cache, then execute callback function * * @param function callback */ loadTranslations: function(callback) { var language = (navigator.language || navigator.userLanguage).substring(0, 2); // note that 'en' is built in, so no translation is necessary if (this.supportedLanguages.indexOf(language) == -1) return; $.getJSON('i18n/' + language + '.json', function(data) { i18n.language = language; i18n.translations = data; callback(); }); }, /** * built in language */ language: 'en', /** * translation cache */ translations: {} } /** * filter methods */ var filter = { /** * Compress a message (deflate compression). Returns base64 encoded data. * * @param string message * @return base64 string data */ compress: function(message) { return Base64.toBase64( RawDeflate.deflate( Base64.utob(message) ) ); }, /** * Decompress a message compressed with compress(). * * @param base64 string data * @return string message */ decompress: function(data) { return Base64.btou( RawDeflate.inflate( Base64.fromBase64(data) ) ); }, /** * Compress, then encrypt message with key. * * @param string key * @param string password * @param string message * @return encrypted string data */ cipher: function(key, password, message) { password = password.trim(); if (password.length == 0) { return sjcl.encrypt(key, this.compress(message)); } return sjcl.encrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), this.compress(message)); }, /** * Decrypt message with key, then decompress. * * @param string key * @param string password * @param encrypted string data * @return string readable message */ decipher: function(key, password, data) { if (data != undefined) { try { return this.decompress(sjcl.decrypt(key, data)); } catch(err) { try { return this.decompress(sjcl.decrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), data)); } catch(err) {} } } return ''; } }; var zerobin = { /** * Get the current script location (without search or hash part of the URL). * eg. http://server.com/zero/?aaaa#bbbb --> http://server.com/zero/ * * @return string current script location */ scriptLocation: function() { var scriptLocation = window.location.href.substring(0,window.location.href.length - window.location.search.length - window.location.hash.length), hashIndex = scriptLocation.indexOf('#'); if (hashIndex !== -1) { scriptLocation = scriptLocation.substring(0, hashIndex); } return scriptLocation; }, /** * Get the pastes unique identifier from the URL * eg. http://server.com/zero/?c05354954c49a487#xxx --> c05354954c49a487 * * @return string unique identifier */ pasteID: function() { return window.location.search.substring(1); }, /** * Return the deciphering key stored in anchor part of the URL * * @return string key */ pageKey: function() { // Some web 2.0 services and redirectors add data AFTER the anchor // (such as &utm_source=...). We will strip any additional data. var key = window.location.hash.substring(1), // Get key i = key.indexOf('='); // First, strip everything after the equal sign (=) which signals end of base64 string. if (i > -1) key = key.substring(0, i + 1); // If the equal sign was not present, some parameters may remain: i = key.indexOf('&'); if (i > -1) key = key.substring(0, i); // Then add trailing equal sign if it's missing if (key.charAt(key.length - 1) !== '=') key += '='; return key; }, /** * ask the user for the password and return it * * @throws error when dialog canceled * @return string password */ requestPassword: function() { var password = prompt(i18n._('Please enter the password for this paste:'), ''); if (password == null) throw 'password prompt canceled'; if (password.length == 0) return this.requestPassword(); return password; }, /** * Show decrypted text in the display area, including discussion (if open) * * @param string key : decryption key * @param array comments : Array of messages to display (items = array with keys ('data','meta') */ displayMessages: function(key, comments) { // Try to decrypt the paste. var password = this.passwordInput.val(); if (!this.prettyPrint.hasClass('prettyprinted')) { try { var cleartext = filter.decipher(key, password, comments[0].data); if (cleartext.length == 0) { if (password.length == 0) password = this.requestPassword(); cleartext = filter.decipher(key, password, comments[0].data); } if (cleartext.length == 0) throw 'failed to decipher message'; this.passwordInput.val(password); helper.setElementText(this.clearText, cleartext); helper.setElementText(this.prettyPrint, cleartext); // Convert URLs to clickable links. helper.urls2links(this.clearText); helper.urls2links(this.prettyPrint); if (typeof prettyPrint == 'function') prettyPrint(); } catch(err) { this.clearText.addClass('hidden'); this.prettyMessage.addClass('hidden'); this.cloneButton.addClass('hidden'); this.showError(i18n._('Could not decrypt data (Wrong key?)')); return; } } // Display paste expiration. if (comments[0].meta.expire_date) { var expiration = helper.secondsToHuman(comments[0].meta.remaining_time), expirationLabel = [ 'This document will expire in %d ' + expiration[1] + '.', 'This document will expire in %d ' + expiration[1] + 's.' ]; this.remainingTime.removeClass('foryoureyesonly') .text(i18n._(expirationLabel, expiration[0])) .removeClass('hidden'); } if (comments[0].meta.burnafterreading) { $.get(this.scriptLocation() + '?pasteid=' + this.pasteID() + '&deletetoken=burnafterreading', 'json') .fail(function() { zerobin.showError(i18n._('Could not delete the paste, it was not stored in burn after reading mode.')); }); this.remainingTime.addClass('foryoureyesonly') .text(i18n._('FOR YOUR EYES ONLY. Don\'t close this window, this message can\'t be displayed again.')) .removeClass('hidden'); // Discourage cloning (as it can't really be prevented). this.cloneButton.addClass('hidden'); } // If the discussion is opened on this paste, display it. if (comments[0].meta.opendiscussion) { this.comments.html(''); // iterate over comments for (var i = 1; i < comments.length; i++) { var place = this.comments; var comment=comments[i]; var cleartext = '[' + i18n._('Could not decrypt comment; Wrong key?') + ']'; try { cleartext = filter.decipher(key, password, comment.data); } catch(err) {} // If parent comment exists, display below (CSS will automatically shift it right.) var cname = '#comment_' + comment.meta.parentid; // If the element exists in page if ($(cname).length) { place = $(cname); } var divComment = $('
' + '
' + '' + '
'); divComment.find('button').click({commentid: comment.meta.commentid}, $.proxy(this.openReply, this)); helper.setElementText(divComment.find('div.commentdata'), cleartext); // Convert URLs to clickable links in comment. helper.urls2links(divComment.find('div.commentdata')); // Try to get optional nickname: var nick = filter.decipher(key, password, comment.meta.nickname); if (nick.length > 0) { divComment.find('span.nickname').text(nick); } else { divComment.find('span.nickname').html('' + i18n._('Anonymous') + ''); } divComment.find('span.commentdate') .text(' (' + (new Date(comment.meta.postdate * 1000).toLocaleString()) + ')') .attr('title', 'CommentID: ' + comment.meta.commentid); // If an avatar is available, display it. if (comment.meta.vizhash) { divComment.find('span.nickname') .before( ' ' ); } place.append(divComment); } var divComment = $( '
' ); divComment.find('button').click({commentid: this.pasteID()}, $.proxy(this.openReply, this)); this.comments.append(divComment); this.discussion.removeClass('hidden'); } }, /** * Open the comment entry when clicking the "Reply" button of a comment. * * @param Event event */ openReply: function(event) { event.preventDefault(); var source = $(event.target), commentid = event.data.commentid, hint = i18n._('Optional nickname...'); // Remove any other reply area. $('div.reply').remove(); var reply = $( '
' + '' + '' + '
' + '
' + '
' ); reply.find('button').click({parentid: commentid}, $.proxy(this.sendComment, this)); source.after(reply); $('#replymessage').focus(); }, /** * Send a reply in a discussion. * * @param Event event */ sendComment: function(event) { event.preventDefault(); this.errorMessage.addClass('hidden'); // Do not send if no data. var replyMessage = $('#replymessage'); if (replyMessage.val().length == 0) return; this.showStatus(i18n._('Sending comment...'), true); var parentid = event.data.parentid; var cipherdata = filter.cipher(this.pageKey(), this.passwordInput.val(), replyMessage.val()); var ciphernickname = ''; var nick = $('#nickname').val(); if (nick != '') { ciphernickname = filter.cipher(this.pageKey(), this.passwordInput.val(), nick); } var data_to_send = { data: cipherdata, parentid: parentid, pasteid: this.pasteID(), nickname: ciphernickname }; $.post(this.scriptLocation(), data_to_send, function(data) { if (data.status == 0) { zerobin.showStatus(i18n._('Comment posted.'), false); $.get(zerobin.scriptLocation() + '?' + zerobin.pasteID() + '&json', function(data) { if (data.status == 0) { zerobin.displayMessages(zerobin.pageKey(), data.messages); } else if (data.status == 1) { zerobin.showError(i18n._('Could not refresh display: %s', data.message)); } else { zerobin.showError(i18n._('Could not refresh display: %s', i18n._('unknown status'))); } }, 'json') .fail(function() { zerobin.showError(i18n._('Could not refresh display: %s', i18n._('server error or not responding'))); }); } else if (data.status == 1) { zerobin.showError(i18n._('Could not post comment: %s', data.message)); } else { zerobin.showError(i18n._('Could not post comment: %s', i18n._('unknown status'))); } }, 'json') .fail(function() { zerobin.showError(i18n._('Could not post comment: %s', i18n._('server error or not responding'))); }); }, /** * Send a new paste to server * * @param Event event */ sendData: function(event) { event.preventDefault(); // Do not send if no data. if (this.message.val().length == 0) return; // If sjcl has not collected enough entropy yet, display a message. if (!sjcl.random.isReady()) { this.showStatus(i18n._('Sending paste (Please move your mouse for more entropy)...'), true); sjcl.random.addEventListener('seeded', function() { this.sendData(event); }); return; } this.showStatus(i18n._('Sending paste...'), true); var randomkey = sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 0), 0); var cipherdata = filter.cipher(randomkey, this.passwordInput.val(), this.message.val()); var data_to_send = { data: cipherdata, expire: $('#pasteExpiration').val(), burnafterreading: this.burnAfterReading.is(':checked') ? 1 : 0, opendiscussion: this.openDiscussion.is(':checked') ? 1 : 0 }; $.post(this.scriptLocation(), data_to_send, function(data) { if (data.status == 0) { zerobin.stateExistingPaste(); var url = zerobin.scriptLocation() + '?' + data.id + '#' + randomkey; var deleteUrl = zerobin.scriptLocation() + '?pasteid=' + data.id + '&deletetoken=' + data.deletetoken; zerobin.showStatus('', false); zerobin.errorMessage.addClass('hidden'); $('#pastelink').html(i18n._('Your paste is %s (Hit [Ctrl]+[c] to copy)', url, url)); $('#deletelink').html('' + i18n._('Delete data') + ''); zerobin.pasteResult.removeClass('hidden'); // We pre-select the link so that the user only has to [Ctrl]+[c] the link. helper.selectText('pasteurl'); helper.setElementText(zerobin.clearText, zerobin.message.val()); helper.setElementText(zerobin.prettyPrint, zerobin.message.val()); // Convert URLs to clickable links. helper.urls2links(zerobin.clearText); helper.urls2links(zerobin.prettyPrint); zerobin.showStatus('', false); if (typeof prettyPrint == 'function') prettyPrint(); } else if (data.status==1) { zerobin.showError(i18n._('Could not create paste: %s', data.message)); } else { zerobin.showError(i18n._('Could not create paste: %s', i18n._('unknown status'))); } }, 'json') .fail(function() { zerobin.showError(i18n._('Could not create paste: %s', i18n._('server error or not responding'))); }); }, /** * Put the screen in "New paste" mode. */ stateNewPaste: function() { this.message.text(''); this.cloneButton.addClass('hidden'); this.rawTextButton.addClass('hidden'); this.remainingTime.addClass('hidden'); this.pasteResult.addClass('hidden'); this.clearText.addClass('hidden'); this.discussion.addClass('hidden'); this.prettyMessage.addClass('hidden'); this.sendButton.removeClass('hidden'); this.expiration.removeClass('hidden'); this.burnAfterReadingOption.removeClass('hidden'); this.openDisc.removeClass('hidden'); this.newButton.removeClass('hidden'); this.password.removeClass('hidden'); this.message.removeClass('hidden'); this.message.focus(); }, /** * Put the screen in "Existing paste" mode. */ stateExistingPaste: function() { this.sendButton.addClass('hidden'); // No "clone" for IE<10. if ($('#oldienotice').is(":visible")) { this.cloneButton.addClass('hidden'); } else { this.cloneButton.removeClass('hidden'); } this.rawTextButton.removeClass('hidden'); this.expiration.addClass('hidden'); this.burnAfterReadingOption.addClass('hidden'); this.openDisc.addClass('hidden'); this.newButton.removeClass('hidden'); this.pasteResult.addClass('hidden'); this.message.addClass('hidden'); this.clearText.addClass('hidden'); this.prettyMessage.removeClass('hidden'); }, /** * If "burn after reading" is checked, disable discussion. */ changeBurnAfterReading: function() { if (this.burnAfterReading.is(':checked') ) { this.openDisc.addClass('buttondisabled'); this.openDiscussion.attr({checked: false, disabled: true}); } else { this.openDisc.removeClass('buttondisabled'); this.openDiscussion.removeAttr('disabled'); } }, /** * Reload the page * * @param Event event */ reloadPage: function(event) { event.preventDefault(); window.location.href = this.scriptLocation(); }, /** * Return raw text * * @param Event event */ rawText: function(event) { event.preventDefault(); var paste = this.clearText.html(); var newDoc = document.open('text/html', 'replace'); newDoc.write('
' + paste + '
'); newDoc.close(); }, /** * Clone the current paste. * * @param Event event */ clonePaste: function(event) { event.preventDefault(); this.stateNewPaste(); // Erase the id and the key in url history.replaceState(document.title, document.title, this.scriptLocation()); this.showStatus('', false); this.message.text(this.clearText.text()); }, /** * Create a new paste. */ newPaste: function() { this.stateNewPaste(); this.showStatus('', false); this.message.text(''); }, /** * Display an error message * (We use the same function for paste and reply to comments) * * @param string message : text to display */ showError: function(message) { if (this.status.length) { this.status.addClass('errorMessage').text(message); } else { this.errorMessage.removeClass('hidden'); var content = this.errorMessage.contents(); content[content.length - 1].nodeValue = ' ' + message; } this.replyStatus.addClass('errorMessage').text(message); }, /** * Display a status message * (We use the same function for paste and reply to comments) * * @param string message : text to display * @param boolean spin (optional) : tell if the "spinning" animation should be displayed. */ showStatus: function(message, spin) { this.replyStatus.removeClass('errorMessage').text(message); if (!message) { this.status.html(' '); return; } if (message == '') { this.status.html(' '); return; } this.status.removeClass('errorMessage').text(message); if (spin) { var img = ''; this.status.prepend(img); this.replyStatus.prepend(img); } }, /** * bind events to DOM elements */ bindEvents: function() { this.burnAfterReading.change($.proxy(this.changeBurnAfterReading, this)); this.sendButton.click($.proxy(this.sendData, this)); this.cloneButton.click($.proxy(this.clonePaste, this)); this.rawTextButton.click($.proxy(this.rawText, this)); $('.reloadlink').click($.proxy(this.reloadPage, this)); }, /** * main application */ init: function() { // hide "no javascript" message $('#noscript').hide(); // preload jQuery wrapped DOM elements and bind events this.burnAfterReading = $('#burnafterreading'); this.burnAfterReadingOption = $('#burnafterreadingoption'); this.cipherData = $('#cipherdata'); this.clearText = $('#cleartext'); this.cloneButton = $('#clonebutton'); this.comments = $('#comments'); this.discussion = $('#discussion'); this.errorMessage = $('#errormessage'); this.expiration = $('#expiration'); this.message = $('#message'); this.newButton = $('#newbutton'); this.openDisc = $('#opendisc'); this.openDiscussion = $('#opendiscussion'); this.password = $('#password'); this.passwordInput = $('#passwordinput'); this.pasteResult = $('#pasteresult'); this.prettyMessage = $('#prettymessage'); this.prettyPrint = $('#prettyprint'); this.rawTextButton = $('#rawtextbutton'); this.remainingTime = $('#remainingtime'); this.replyStatus = $('#replystatus'); this.sendButton = $('#sendbutton'); this.status = $('#status'); this.bindEvents(); // Display status returned by php code if any (eg. Paste was properly deleted.) if (this.status.text().length > 0) { this.showStatus(this.status.text(), false); return; } // Keep line height even if content empty. this.status.html(' '); // Display an existing paste if (this.cipherData.text().length > 1) { // Missing decryption key in URL? if (window.location.hash.length == 0) { this.showError(i18n._('Cannot decrypt paste: Decryption key missing in URL (Did you use a redirector or an URL shortener which strips part of the URL?)')); return; } // List of messages to display. var messages = $.parseJSON(this.cipherData.text()); // Show proper elements on screen. this.stateExistingPaste(); this.displayMessages(this.pageKey(), messages); } // Display error message from php code. else if (this.errorMessage.text().length > 1) { this.showError(this.errorMessage.text()); } // Create a new paste. else { this.newPaste(); } } } /** * main application start, called when DOM is fully loaded * runs zerobin when translations were loaded */ i18n.loadTranslations($.proxy(zerobin.init, zerobin)); });